When Andy Warhol reproduced a grainy photograph of Da Vinci’s Mona Lisa in a series of seven colored canvases in 1963, it was considered radical. But it opened the door for an examination of the relationship between high art and consumer culture, and called into question what was really important about paintings: the process of their creation or the end result. Warhol’s hybrids of the sacred and the profane might be the furthest thing from your mind when you see two recent paintings by Nashville-based artist Rocky Horton that are currently on view at David Lusk Gallery, but the artist’s focus on process continues the conversation that Warhol started, even as he reverses it.